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Dimming method and dimming device

A technology of a dimming device and a light source, applied in the field of optical communication, can solve the problems of insufficient flexibility, inability to smoothly adjust the brightness of the light source, and lack of a specific implementation scheme for the dimming function, and achieve the effect of flexible dimming

Inactive Publication Date: 2019-08-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) In the idle / receiving state, the sender uses the idle pattern (idle pattern), that is, realizes dimming by independently sending frames for adjusting the brightness, but this method lacks a specific implementation plan for realizing the dimming function;
[0006] 2) At the physical layer, the idle mode closely related to the modulation method and channel coding scheme is used for dimming. This method can only adjust the brightness of the light source with a predetermined range, but cannot smoothly adjust the brightness of the light source, and the dimming is flexible. degree is not enough

Method used

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  • Dimming method and dimming device

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Embodiment Construction

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] Such as figure 1 As shown, the dimming method described in the embodiment of the present invention includes the following steps:

[0027] Step 101 , at a media access control (MAC, Media Access Control) layer, divide a MAC data service unit (MSDU, MAC Service Data Unit) into multiple sub-MSDUs of equal length.

[0028] Step 102: Encapsulate each divided sub-MSDU into a mutually independent MAC protocol data unit (MPDU, MAC Protocol Data Unit), and generate a compensation frame (CF, CF) for the MPDU according to the target value of the light source brightness. Compensatory Frame).

[0029] Step 103, aggregate and generate a physical-layer service data unit (PSDU, Physi...

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Abstract

The invention discloses a dimming method and a dimming device. The method comprises: at the medium access control (MAC) layer, dividing a MAC data service unit (MSDU) into a plurality of sub-MSDUs of equal length; MSDUs are respectively encapsulated into independent MAC protocol data units (MPDUs), and compensation frames (CFs) are generated for each MPDU according to the target brightness value of the light source; aggregate the MPDU and the CF into a physical layer protocol data unit (PPDU) ) of the physical layer service data unit (PSDU), and transmit the PPDU.

Description

technical field [0001] The invention relates to a dimming technology in the field of optical communication, in particular to a dimming method and a dimming device. Background technique [0002] Visible light communication (VLC, Visible Light Communication) technology refers to the technology of short-distance optical wireless communication using an optical medium with a wavelength in the range of 400 nanometers (nm) to 700 nm that is visible to the naked eye. The VLC technology has the advantages of being free from electromagnetic interference, and there is no interference related to radio frequency (RF, Radio Frequency) systems, and the spectrum range it uses is an unlicensed spectrum (Unlicensed Spectrum). When using visible light for data transmission, at the sending end, the visible light source (such as a light-emitting diode) can be turned on and off quickly or the brightness of the visible light source can be modulated; at the receiving end, after receiving the modula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/951H04B10/116H04L47/43
CPCH04B10/116H04L12/46H04L12/4633
Inventor 吕宁支周禹忠
Owner ZTE CORP
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